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Motor upgrade for lathe

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Forum topic by rizay posted 1677 days ago 714 views 0 times favorited 3 replies Add to Favorites Watch
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rizay

73 posts in 1682 days


1677 days ago

Topic tags/keywords: question lathe

First off, sorry about my ignorance.

I’ve been doing a lot of research on lathe mods. One thing that I would like to do is upgrade the motor on my lathe. I see that a lot of people online have mentioned using dc motors and pwm’s from treadmills. I concidered this method for a while, but I think I want to go with the 3ph 2-3hp 220 vac motor and variable frequency drive. I have spent a lot of time searching for a motor and vfd online and have run into a few questions.

1. Most vfd’s advertised say the max hp for the motor that they can run. I am guessing that is the max amps the vfd puts out?
2. If your got a 3hp vfd, I assume you could use say a 2hp motor with it?
3. The output freq for the vfd is a range. I have seen some say 0-60, 0-400, or one that said 5-68. I may be a little off on the numbers. Am I correct in the assumption that the hertz is what determines the rpm on the motor? If so, then a vfd that puts our 0-60hz would have an rpm range from 0-X rpm?
4. Most vfd I have seen have a forward and reverse option. Does this require a certain type of ac motor for both directions?
5. I have read that some motors require a capacitor start. Is that something that a vfd is able to do?

I have many more questions, but I’ll leave it at these for now. It seems the more I read, the more questions come up.

If anyone has done an upgrade like this, please let me know what would be a good motor/vfd would be and a possible source. A lot of people talk about ebay and this online surplus store

Any information would be greatly appreciated.

-- Come visit me at WoodChux and see my work, get free woodworking plans, and find the lowest priced bottle stopper kits around.


3 replies so far

View UnionLabel's profile

UnionLabel

660 posts in 1796 days


#1 posted 1677 days ago

http://www.electricmotorwarehouse.com/Smart_Motor.htm
http://www.leeson.com/
You might want to look at these two web sites. They contain valuable information that can help with your questions. Also, they have phone numbers to call customer service in order to get more technical information for your particular application.

-- Methods are many,Principles are few.Methods change often,Principles never do.

View rizay's profile

rizay

73 posts in 1682 days


#2 posted 1676 days ago

Thanks for the links. I’ll take a look around and hopefully find something.

-- Come visit me at WoodChux and see my work, get free woodworking plans, and find the lowest priced bottle stopper kits around.

View rizay's profile

rizay

73 posts in 1682 days


#3 posted 1676 days ago

I found this motor and this vfd. What do you all think?

-- Come visit me at WoodChux and see my work, get free woodworking plans, and find the lowest priced bottle stopper kits around.

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